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[Doc] Add pre-requisites

[Doc] Add installation

* Convert mask to bool before using it as img's index

* lint

* Rewrite code in more concise way

* Support TTA of ATSS, FCOS, YOLOv3

* Add comment

* Add regression test and test data

* Add fix for empty gt images

* Trigger CI build

* refactor get_subset_by_classes

* reformat and fix docstring

* [refactor]: move get_subset_by_classes to _filter_imgs

* make img_ids consistent

* resolve comments

* simplify logics

* add warning

* add warning

* add warning

Co-authored-by: mmeendez8 <miguelmndez@gmail.com>

* fix rpn transforming bug in two_stage

* Clean background_labels in the dense heads

* clean format

* Reformat

* Fix CI bug

* fix fsaf and the comments

* fix newly added heads

* fix yolact

* complete comments

* update

* fix lint error

* add bbox_pred_split in sabl_head

* fix lint error

* fix yapf

* fix build error

* fix yapf

* add doc of modify loss

* minor fix

* change name

* YOLACT (not the final commit, so please don't review)

* Implementation notes for YOLACT

* Modify yolact_r50.py

* Update YOLACT configs

* Add YOLACT README

* Adjust according to the first round of review

* Handle the corner case when gt_mask is empty

* Add unit tests for YOLACT heads

* Add unit tests for YOLACT forward

* Adjust according to Kai's comments, except for gt_mask filtering

* Change use_OHEM to use_ohem in unit tests

* Update config in YOLACT unit tests

* merge bbox overlap and batch bbox overlap

* fix unit test

* refactor some codes and fix some bugs

* fix isort

* fix ci

* update model link

* fix cfg path

* support batch test

* Make get_seg_masks faster

* fix format

* update readme

Co-authored-by: Cao Yuhang <yhcao6@gmail.com>

* re-implement Translate augmentation using mmcv.imtranslate

* add translate abstractmethod for base class

* add PolygonMasks supports toy

* toy commit

* add supports for PolygonMasks

* merge translate.py into auto_augment.py and add unit test for AutoAugment equipped with Translate

* move some variables in call function to self

* fix raising IndexError when getitem from empty index for PolygonMasks

* remove unnecessary interpolation

* add assertion message for fill_val when translating PolygonMasks

* add format

* add comments

* fix handle conflicts

* fix module not registered

* add centripetal head

* update var names in CentripetalHead

* pre-commit

* modify init_weight to align performance

* add config and README

* fix lint

* update docstring

* update README.md and model_zoo.md

* implements augmentation which only transform images (e.g. Color,Sharpness) in process

* Add augs which only transform image (e.g. Sharpness, Equalize, Color) in process.

* remove test_augonlyimg.py

* re-implement color,brightness,equalize,contrast using mmcv

* rename aug_only_img as img_augment

* remove aug_only_img related files

* merge img_augment.py into auto_augment.py

* update tutorials for changing training settings

* update

* Update details of hook

* resolve comments

* reformat

* add customize workflow

* clarify

* rephrase

* rephrase

* fix comments

Co-authored-by: Cao Yuhang <yhcao6@gmail.com>

* add Rotate augmentation init

* add coco_dummy data for unit test of augmentations

* add coco_dummy data for unit test of augmentations

* add Rotate augmentation

* remove duplicated warpAffine declaration.

* remove unnecessary coco_dummy folder

* re-implements rotate augmentation upon mmcv.imrotate

* fix uint test

* reformat

* add supports for PolygonMasks

* handle __init__ conflicts

* unchange

* pull from master and merge rotate.py into auto_augment.py

* add unit test for autoaugment equipped with rotate

* move random_negative_prob to self and reformat assertion message

* fix bc break of mmdet.core.fp16, refactor import of wrap_fp16_model

* changed warning method

* added docstring for Depr_Fp16OptimizerHook

* docformatter

* fix docstring

* changed names from depr to deprecated

* Move RepPoints TTA to mixin class for reuse

* Support TTA of RetinaNet

* Support TTA of GFL

* Update to use BBoxTestMixin in dense_heads

* Update for v2.4.0 inference

* add Shear augmentation.

* remove duplicated warpAffine declaration.

* fix shear bboxes

* re-implements Shear augmentation using mmcv.imshear

* fix the name of some variables

* reformat

* add shear abstractmethod for BaseInstanceMasks

* supports for PolygonMasks

* add docstring

* add more unit test

* reformat assertion message

* remove unnecessary comma in function

* refactor

* remove unnecessary

* remove unnecessary copy

* mergt shear.py into auto_augment.py

* add unit test for autoaugment equipped with shear

* fix mask head Conv2d deprecated bug

* isort

* updated mmcv version requirement